djvu | 6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347

Analysis

max time kernel
298s
max time network
158s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
16-05-2024 23:23

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General

Target

6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
Size

743KB
MD5

ab7f5c6b0c187e475ea5ae7e42de2d3c
SHA1

7b4c3f5e22bfab8cdb856f90496fb70554ae0cfe
SHA256

6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347
SHA512

20f7818183b53f7f339bef38bfe0c94794c087d9f0750ae558c09c11c5527272de67a95f3e548ed819045852b0403932ff36d9f8ec0cc881faa31ad45345cbc6
SSDEEP

12288:sX6KW8Cr/nrSwPcmV4eIwNn5x5vQWHXvZB9w5dPQ8i:sX1YrPuwPtRpn5x5vQWRE5dPa

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://cajgtus.com/test1/get.php

Attributes

extension
.qepi
offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/665ddae3fc3cd10bbaaa4350408b196920240504141005/4cae7e Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0867PsawqS

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/2380-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2920-6-0x0000000002600000-0x000000000271B000-memory.dmp	family_djvu
behavioral1/memory/2380-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2380-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2380-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-45-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-46-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-47-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-52-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-51-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-49-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-53-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2676-54-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2592	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\07baf080-f208-4221-92c1-74e27819301f\\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe\" --AutoStart"	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
9	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2920 set thread context of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2680 set thread context of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
2676	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
2676	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2920 wrote to memory of 2380	2920	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	28
PID 2380 wrote to memory of 2592	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	29
PID 2380 wrote to memory of 2592	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	29
PID 2380 wrote to memory of 2592	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	29
PID 2380 wrote to memory of 2592	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	29
PID 2380 wrote to memory of 2680	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	30
PID 2380 wrote to memory of 2680	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	30
PID 2380 wrote to memory of 2680	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	30
PID 2380 wrote to memory of 2680	2380	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	30
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31
PID 2680 wrote to memory of 2676	2680	6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe	31

C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
"C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
  "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2380
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\07baf080-f208-4221-92c1-74e27819301f" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2592
- - C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
    "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2680
  - - C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe
      "C:\Users\Admin\AppData\Local\Temp\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2676

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
c385b784ab9ca816e84a497ed6ae04cc

SHA1
ebf2dba7c1f1425116a8ff8b73eab06fc4e47a7a

SHA256
8b1eaa18dd169f3513c85869aca04c1a469ce3351e81bb54ea0fde5c80396566

SHA512
19bf0214112ce18c9f804d386a9d306b5e77479cb863dfd9eb90ce16ab7eab9dd2aa490e82b99df81ddcde41525eff5c4997c912ea0d85db589c2121e3db0718

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
901e8922138d8018168623d0dcecee49

SHA1
e291346ad1477516ab2c3a33d7eec718b32b583d

SHA256
31ca01bf381bf9c1cabe7e1781a04c7296a5d841a522f68252b37a5dc2f59bab

SHA512
d052fb4a957c1b4a8a6412cc70eb8c96de1db1825942fbfcc16761185845697b9aa0a3a8664f68ec51907b40d8b41acf599c5227385d0b6abd87b3926ad480c5

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
afbe707aec069d03614840884f87adfa

SHA1
2a66e36cc1893ed5c480768d5ebc35b4feb0b550

SHA256
740999eae84aaf89975244a3791e25edfccbfa27661c664ea87060b7389339ea

SHA512
ab96079e0b0ac04a7437e9c49dd3b114da20cff0c24f0ddbc08e34492138e31d97e16550cb731b2ed746f50d32486b71549ec66e6611a5921f05a5d4ca53ee7f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
9d7f36d43de6bcfa3f8f01fa966f8721

SHA1
d8ce4c4f9420526c963257b55783a368b5b011fe

SHA256
4af345c7366dffa2e2205931b118973d5873216f6508f58c97af30db5a6c568a

SHA512
3821f814e10815e04d6c40c73ca62d25b6a58e9034d62f09ff9ba41841776c79e653892ba2905b1561ab11bcf1d678083bc2b2e95e25927350ce948f417fb906

Download Submit
C:\Users\Admin\AppData\Local\07baf080-f208-4221-92c1-74e27819301f\6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347.exe

Filesize
743KB

MD5
ab7f5c6b0c187e475ea5ae7e42de2d3c

SHA1
7b4c3f5e22bfab8cdb856f90496fb70554ae0cfe

SHA256
6f4f75bf4b5f1be02e3eef196b29683473fe5f0d3dc48b436e936a6bcaf2a347

SHA512
20f7818183b53f7f339bef38bfe0c94794c087d9f0750ae558c09c11c5527272de67a95f3e548ed819045852b0403932ff36d9f8ec0cc881faa31ad45345cbc6

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab4B43.tmp

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
memory/2380-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2380-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2380-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2380-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2380-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2676-52-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-45-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-46-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-47-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-51-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-49-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-53-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2676-54-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2680-29-0x0000000000310000-0x00000000003A2000-memory.dmp

Filesize
584KB

Download
memory/2920-0-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download
memory/2920-6-0x0000000002600000-0x000000000271B000-memory.dmp

Filesize
1.1MB

Download
memory/2920-1-0x0000000000220000-0x00000000002B2000-memory.dmp

Filesize
584KB

Download